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William Peytz

Projects

Things I've built or contributed to. Each one has a short case study.

Stemma

A Danish-speaking AI phone assistant that handles inbound calls (scheduling, bookings, and sales) for businesses that miss calls when no one can pick up.

  • Python
  • ASR
  • LLMs
  • TTS
  • Telephony APIs

Simbolic

Infrastructure for orchestrating engineering simulations across different tools, with standardized interfaces for reproducible simulation workflows.

  • Python
  • Simulation tooling
  • Workflow orchestration

EloQuiz.dk

Adaptive math learning platform that uses an Elo-based difficulty system to match each student to the right next question.

  • Vue
  • Flask
  • Firebase
  • OpenAI API

LifeRunner.io

A strategy-based life simulation game where time, energy, and money are limited, and the point is to feel the tradeoffs, not to win.

  • Game design
  • Behavioral economics
  • EdTech

MinuteMind

A webapp that turns a single prompt into a short, narrated learning video, with script, voiceover, and rendered footage from one topic.

  • Vue 3
  • TypeScript
  • FastAPI
  • OpenAI API
  • GCP
  • FFmpeg

PeytzNotes.dk

An AI study assistant that turns five years of university notes into a searchable, connected, personalized knowledge base, with semantic search, cited chat, exam summaries, and auto-generated flashcards.

  • Next.js
  • FastAPI
  • pgvector
  • Supabase
  • OpenAI
  • Docker

PeytzPvP

A modern Hardcore Games-style PvP plugin for Minecraft Paper servers, with Java 21, modular architecture, config-driven balancing, and a marketing site at peytzpvp.com.

  • Java 21
  • Paper
  • Gradle
  • SQLite
  • Astro

StartupSocial.net

An invite-only social network built specifically for startup founders, with profiles, feed, connections, direct messaging, and a real auth and admin layer underneath.

  • React
  • Express
  • PostgreSQL
  • Prisma
  • JWT
  • Docker

LastNameLegacy.com

A guess-the-first-name game built around famous surnames, with two modes (historical and living people) and an LLM-assisted scorer that grades each answer against the canonical match.

  • Next.js 16
  • React 19
  • Supabase
  • OpenAI
  • TypeScript
  • Tailwind

Task Manager

A production-ready task manager built end to end on the .NET stack, with auth, CRUD, PostgreSQL, and Docker on Railway with CI/CD from GitHub.

  • ASP.NET Core
  • EF Core
  • PostgreSQL
  • Bootstrap 5
  • Docker
  • Railway

Industrial Anomaly Detection with DINOv3

Zero- and few-shot defect detection on the MVTec dataset using frozen DINOv3 features, embedding similarity, and patch-level localization.

  • PyTorch
  • DINOv3
  • MVTec AD

Trading with ETFs

Nine years of ETF data analyzed in R to build optimized portfolios, using variance minimization, bootstrapping, CVaR, and regression-based performance metrics.

  • R
  • Portfolio optimization
  • CVaR
  • Bootstrapping

Instrument Audio Classification

CNN and LSTM models for classifying 15 musical instruments from short audio clips, reaching 96–98% accuracy after tuning.

  • PyTorch
  • CNN
  • LSTM
  • Librosa

Car Price Prediction

PCA-driven feature engineering plus a head-to-head comparison of regularized regressors, neural networks, and classifiers, evaluated with cross-validation and statistical tests.

  • Python
  • scikit-learn
  • PyTorch
  • PCA

Project Management System

A time and task management tool ("TimeManager") for software teams, designed around SOLID and design patterns, with full coverage and formal white-box and contract-based testing.

  • Java
  • JUnit
  • SOLID
  • Design patterns
  • Contract testing

AI in the Future of Surveillance

A research paper bridging neural-network fundamentals with a literary analysis of Orwell's 1984, and the modern parallels in mass data collection, algorithmic propaganda, and state surveillance.

  • AI ethics
  • Neural networks
  • Literary analysis
  • Research

EasyLINC 2.0

A ride-ordering interface designed for elderly users, with accessibility-first UX, iterative prototyping, and real user testing.

  • UX research
  • Figma
  • Prototyping